random_triangular: sqrt() is more accurate than **0.5 (#3317)

rhettinger · web-flow · commit f5ea83f48642 · 2017-09-04T16:51:06.000-07:00
diff --git a/Lib/random.py b/Lib/random.py
@@ -388,7 +388,7 @@ def triangular(self, low=0.0, high=1.0, mode=None):
             u = 1.0 - u
             c = 1.0 - c
             low, high = high, low
-        return low + (high - low) * (u * c) ** 0.5
+        return low + (high - low) * _sqrt(u * c)
 
 ## -------------------- normal distribution --------------------
 
